Apple's screen recording feature on iPhone and iPad allows users to capture video of their screen activities.
You can include a voiceover in your screen recordings by following the steps provided by Apple.
To enable voiceover, swipe down diagonally from the top-right corner to access Control Center, then long press the Screen Recording button and activate the Microphone option.
Once voiceover is enabled, start recording your screen activities and end the recording by tapping the Stop button in the top-left corner.